diff --git a/cicd/Cicd.BuildDriver/packages.lock.json b/cicd/Cicd.BuildDriver/packages.lock.json
index 8bb6d5de..f6a4f010 100644
--- a/cicd/Cicd.BuildDriver/packages.lock.json
+++ b/cicd/Cicd.BuildDriver/packages.lock.json
@@ -304,8 +304,8 @@
       },
       "FluentAssertions": {
         "type": "Transitive",
-        "resolved": "5.10.3",
-        "contentHash": "gVPEVp1hLVqcv+7Q2wiDf7kqCNn7+bQcQ0jbJ2mcRT6CeRoZl1tNkqvzSIhvekyldDptk77j1b03MXTTRIqqpg==",
+        "resolved": "6.10.0",
+        "contentHash": "Da3YsiRDnOHKBfxutjnupL1rOX0K/jnG6crn5AgwukeqZ/yi+HNCOFshic01ke0ztZFWzpfQMXH8fO9aAbG0Gw==",
         "dependencies": {
           "System.Configuration.ConfigurationManager": "4.4.0"
         }
@@ -1915,7 +1915,7 @@
           "AutoFixture.NUnit3": "[4.18.0, )",
           "Brighid.Discord.Core": "[1.0.0, )",
           "CacheExpirer": "[1.0.0, )",
-          "FluentAssertions": "[5.10.3, )",
+          "FluentAssertions": "[6.10.0, )",
           "Microsoft.NET.Test.Sdk": "[17.5.0, )",
           "MockQueryable.NSubstitute": "[7.0.0, )",
           "Models": "[1.0.0, )",
diff --git a/tests/Adapter/Users/Services/ConcurrentUserIdCacheTests.cs b/tests/Adapter/Users/Services/ConcurrentUserIdCacheTests.cs
index 7942a220..fcbc40a3 100644
--- a/tests/Adapter/Users/Services/ConcurrentUserIdCacheTests.cs
+++ b/tests/Adapter/Users/Services/ConcurrentUserIdCacheTests.cs
@@ -27,7 +27,7 @@ public class RemoveByIdentityId
                 cache.RemoveByIdentityId(identityId1.Id);
 
                 cache.Should().NotContainKey(discordId1);
-                cache.Should().ContainKey(discordId2).WhichValue.Should().Be(identityId2);
+                cache.Should().ContainKey(discordId2).WhoseValue.Should().Be(identityId2);
             }
         }
     }
diff --git a/tests/Tests.csproj b/tests/Tests.csproj
index 324bb27c..e07ba38f 100644
--- a/tests/Tests.csproj
+++ b/tests/Tests.csproj
@@ -12,7 +12,7 @@
         <PackageReference Include="AWSSDK.Organizations" Version="3.7.102.31" />
         <PackageReference Include="AWSSDK.SecurityToken" Version="3.7.101.49" />
         <PackageReference Include="AWSSDK.SimpleSystemsManagement" Version="3.7.104.17" />
-        <PackageReference Include="FluentAssertions" Version="5.10.3" />
+        <PackageReference Include="FluentAssertions" Version="6.10.0" />
         <PackageReference Include="MockQueryable.NSubstitute" Version="7.0.0" />
         <PackageReference Include="NSubstitute" Version="4.2.2" />
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.5.0" />
diff --git a/tests/packages.lock.json b/tests/packages.lock.json
index 80ef4f0f..8b605f38 100644
--- a/tests/packages.lock.json
+++ b/tests/packages.lock.json
@@ -60,9 +60,9 @@
       },
       "FluentAssertions": {
         "type": "Direct",
-        "requested": "[5.10.3, )",
-        "resolved": "5.10.3",
-        "contentHash": "gVPEVp1hLVqcv+7Q2wiDf7kqCNn7+bQcQ0jbJ2mcRT6CeRoZl1tNkqvzSIhvekyldDptk77j1b03MXTTRIqqpg==",
+        "requested": "[6.10.0, )",
+        "resolved": "6.10.0",
+        "contentHash": "Da3YsiRDnOHKBfxutjnupL1rOX0K/jnG6crn5AgwukeqZ/yi+HNCOFshic01ke0ztZFWzpfQMXH8fO9aAbG0Gw==",
         "dependencies": {
           "System.Configuration.ConfigurationManager": "4.4.0"
         }